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Finding the Fourth Proportional to 645,150.73, 890,311.47 and 354,781.02

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Solution

The fourth proportional to 645,150.73, 890,311.47 and 354,781.02 is: 489,599.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,150.73 : 890,311.47 = 354,781.02 : x
  2. Step 2: Convert to fraction form
    645,150.73/890,311.47 = 354,781.02/x
  3. Step 3: Cross multiply
    645,150.73x = 890,311.47 × 354,781.02
  4. Step 4: Simplify right side
    645,150.73x = 315,865,611,444.30
  5. Step 5: Solve for x
    x = 315,865,611,444.30/645,150.73
  6. Step 6: Final answer
    x = 489,599.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.